Motorola DCT2000 Installation Manual page 35

I n s t a l l a t i o n
D o l b y D i g i t a l C a b l i n g D i a g r a m s
The DCT 2000 can deliver Dolby AC-3 audio to a Dolby Digital stereo receiver using the SPDIF
RCA connector. Because the SPDIF does not carry audio for analog channels, use both the
baseband L/R audio and the SPDIF connectors when connecting the DCT 2000 to a digital
receiver.
PCM audio and AC-3 are the operation modes for the SPDIF connector. PCM audio mode is the
default setting from the factory. Use the Electronic Program Guide (EPG) to select an
alternative operating mode for the DCT 2000. If the EPG does not provide a PCM or AC-3
option, then the SPDIF port will default to PCM audio.
Table 3-1 describes the functionality of the audio ports based on the digital audio mode
selected:
Left/Right RCA ports
SPDIF RCA port
For normal viewing:
Set the DCT 2000 to PCM audio mode using the Electronic Program Guide.
Adjust the Dolby Digital receiver input audio settings for the DCT 2000 to baseband L/R
inputs (refer to stereo receiver instructions for more information). This prevents audio loss
while channel surfing through analog channels.
When a digital program has been selected for viewing, set the DCT 2000 to AC-3 mode
using the EPG. Set the stereo receiver to digital audio input to experience AC-3 audio.
Many Dolby Digital receivers are designed with A/V output ports that feed external devices
such as a VCR. The AV output content is based on the selected input device. If the DCT 2000 is
selected as the input device for VCR recording, an alternate device cannot simultaneously use
the Dolby Digital receiver, or the VCR will then record the secondary device. (Reference the
Dolby Digital receiver installation manual for information on selecting and configuring A/V
interfaces on the receiver).
Audio for digital and analog channels
PCM audio
(Audio on digital channels only)
Audio for analog channels only
Dolby AC-3
(Audio on digital channels only)